Multiple Choice
The first step of a viral infection is virus ______________, when the spike proteins of the virus attach to the ___________ of the host cell.
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18. Viruses, Viroids, & Prions
Animal Viruses: 1. Attachment to the Host Cell
Multiple Choice
An antiviral drug specifically modifies viral receptors on a eukaryotic host cell. How might this affect the viral reproductive cycle?
A
It would stop the virus from attaching to the host cell.
B
It would facilitate the process of entry via endocytosis.
C
It would result in the uncoating of the viral DNA.
D
It would increase the production of viral proteins by the host cell.
Verified step by step guidance1
Understand the role of viral receptors: Viral receptors on host cells are specific proteins or molecules that viruses bind to in order to initiate infection. This binding is crucial for the virus to attach and enter the host cell.
Consider the effect of modifying viral receptors: If an antiviral drug modifies these receptors, it could potentially prevent the virus from recognizing and binding to the host cell, thereby inhibiting the initial step of the viral reproductive cycle.
Analyze the impact on viral attachment: Without proper attachment to the host cell, the virus cannot enter the cell to begin replication. This would effectively stop the virus from attaching to the host cell, preventing further steps in the viral life cycle.
Evaluate the possibility of endocytosis: If the modification of receptors somehow facilitates endocytosis, it could allow the virus to enter the cell more easily. However, this is less likely if the receptors are being blocked or altered to prevent viral entry.
Consider downstream effects: If the virus cannot attach and enter the host cell, subsequent steps such as uncoating of viral DNA and production of viral proteins by the host cell would not occur, as these processes depend on successful entry and replication of the virus.
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